laptop repair

I have a compaq presario 700 laptop. The plug in for the electric adaptor is loose, and I can not get the cover off. I have taken out the screws and it still will not open. Is there a secret latch or something????

on most laptops, that connector is soldered to the motherboard, so taking the cover off is the least of your worries. You are likely going to have to replace the motherboard, or in the least replace the charger board(if that system has it as a separate card) unless you want to try soldering it back